Answer:
d = 48.03 feet
Explanation:
Given that,
The maximum angle for a wheelchair ramp entering a business at 4.76 degrees.
We need to find the horizontal distance needed to accomidate a ramp that goes up to a door 4 feet of the ground.
We can solve it using trigonometry.

Where
h is height
d is the angle of elevation

So, the horizontal distance is equal to 48.03 feet.